The swelling, hardness can be normal but it's not possible to say do with any certainly because you may also have an infection at 10 days. The only person who can give you an answer is your plastic surgeon who did the surgery. You should follow up with him/her with your concerns.
It is not unusual to have swelling beneath your incision in your pubic area. This will soften up over the next 2-3 months and the pain should resolve.
Earl Stephenson, Jr, MD, DDS, FACS